Sorry, we don’t post external links. Maybe you can name the article for a google search -29
Here is article looking at the efficacy of surgical vs N95 masks well before Covid. There are many medical articles before March 2020 showing the efficacy of masks against aerosol pathogens.
As someone commented above, doctors have been wearing masks for over a hundred years. In fact, during the Spanish flu, everyone wore cloth masks and they were deemed effective.
The WHO and CDC were against masks in the beginning of covid as they were worried about having enough for Healthcare workers. Pls think of others and social distance and wear a mask properly over your mouth and nose. Use a non disposable one and wash every night with soap and water. Stay safe and be well
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